3d and 2d Seismic Surveys Block T-39p, Bass Strait Australia

Seismic Processing Report Benaris Petroleum N.V., T/39P 3D and 2D 2006 (1486ben)

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PGS Data Processing A/P Pty. Ltd.

Data Processing Report

3D and 2D SEISMIC SURVEYS BLOCK T/39P, BASS STRAIT

AUSTRALIA

For

Benaris Petroleum N.V.

Prepared by:

PGS Data Processing, Perth, Western Australia

May 2006


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TABLE OF CONTENTS

1. INTRODUCTION ............................................................................................................ 4 1.1 Survey Area...........................................................................................................................4 1.2 Geophysical Objectives ........................................................................................................6 1.3 Acquisition Configuration ...................................................................................................6

2. PRODUCTION PROCESSING...................................................................................... 7 2.1 Processing Summary ............................................................................................................7 2.2 Pre-Migration Processing Details........................................................................................9 2.3 Migration and Post Migration Processing........................................................................14

3. VELOCITY ANALYSIS................................................................................................ 18 3.1 Velocity Passes ....................................................................................................................18 3.2 3D Velocity Timeslices........................................................................................................19

4. PARAMETER TESTING.............................................................................................. 28 5. PERSONNEL.................................................................................................................. 35 6. APPENDICES................................................................................................................. 36

6.1 Appendix 1 Aquisition Parameters ...............................................................................36 6.2 Appendix 2 Line Naming Conventions..........................................................................38 6.3 Appendix 3 Field Tape Line Listings.............................................................................39 6.4 Appendix 4 Dephase Filter.............................................................................................42 6.5 Appendix 5 Zero Phasing Filter ....................................................................................44 6.6 Appendix 6 Geodesy and Processing Grid Details .......................................................46 6.7 Appendix 7 Deliverables Tape Listing...........................................................................47 6.8 Appendix 8 EBCDIC & Trace Headers from SEG Y Deliverables ............................53 6.9 Appendix 9 Powerpoints Hyperlinked in Parameter Testing (Section 4) ..................81


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LIST OF FIGURES

Fig 1 : Map Showing Position of 2D and 3D Surveys ............................................................4 Fig 2 : Map Showing the 23 2D Lines .....................................................................................5

LIST OF TABLES

Table 1 : SPRINT parameters.............................................................................................13 Table 2 : Residual Exponential gain......................................................................................13 Table 3 : Outer Mute applied (ramp=20ms) ........................................................................15 Table 4 : Inner Mute applied(ramp=20ms)..........................................................................15 Table 5 : Time-variant Bandpass Filters ..............................................................................17 Table 6 : Final Residual Exponential gain............................................................................17 Table 7 : Field Tape Data Pre-processed for PJ 3D Project ...............................................39 Table 8 : Field Tape Data Pre-processed for PJ 2D Project ...............................................41 Table 9 : Coefficient Listing...................................................................................................42 Table 10 : Coefficient Listing.................................................................................................44 Table 11 : PJ 3D Pre-STM Gather SEGY............................................................................47 Table 12 : PJ 2D Pre-STM Gather SEGY............................................................................48 Table 13 : PJ 3D Raw and Final Migration Stack SEGY ...................................................49 Table 14 : PJ 2D Raw and Final Migration Stack SEGY ...................................................50 Table 15 : PJ 2D and PJ 3D Velocities and Coordinates.....................................................51 Table 16 : PJ 2D Paper Displays and equivalent CGMs ...................................................51 Table 17 : PJ 2D Line Ranges................................................................................................52


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1. INTRODUCTION

1.1 Survey Area The Project included a 3D and a 2D Survey located in Block T/39P, in the Bass Strait between Victoria and Tasmania. The 2D Survey was positioned on the north-western edge of the 3D Survey. The nominal strike direction in the area was 309 degrees which was the sail-line direction for the 3D Survey. The 3D Survey was 203 sq kms (full fold) and the 2D was 380 shot kms (330 kms full fold). There was little variation in the water depth, being approximately 75 m.

145 50 00E 146 40 00E 147 30 00E

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145 50 00E 146 40 00E 147 30 00E

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A U S T R A L I A

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Burnie

B A S S S T R A I T

Fig 1 : Map Showing Position of 2D and 3D Surveys


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Fig 2 : Map Showing the 23 2D Lines


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1.2 Geophysical Objectives

3D to delineate and quantify recognised prospects. 2D for Regional appraisal of area adjoining the 3D prospect. Preserve amplitudes such that any AVO anomalies were preserved; Optimise the migration imaging; Maximise Signal/Noise; Provide a zero phase match with existing 2D data.

1.3 Acquisition Configuration A full description of the acquisition details for both the 3D and 2D Surveys are given in the following Appendices: Appendix 1 has detailed acquisition parameters Appendix 2 details line naming conventions Appendix 3 details lines acquired and processed


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2. PRODUCTION PROCESSING

2.1 Processing Summary Pre-migration processing: 1. Reformat. 2. Time Shifts to MSL Instr. Corr.(-120ms); Source/cable Corr.(+9ms) ; Tidal Corr. 3. Navigation/Seismic Merge X,Ys created. 4. Observers Log Edits. 5. Tape Output. 6. Low-cut Filter 4/18 90/72 (Hz/dBperOct.). 7. Swell Noise Attenuation (Seq. 24 and 25 only). 8. Resample to 4ms. (no anti-alias filter). 9. NMO apply (Reformat 1km Velocities). 10. Trim On-mute (for precursor and first breaks). 11. Despike (shot domain). 12. Spherical Divergence (t gain). 13. NMO remove (Reformat 1km Velocities). 14. Tau-P Deconvolution (Design 0-4000ms; 32+208ms operator). 15. Muting in Tau-P domain (removal of linear noise). 16. Removal of Spherical Divergence (t gain). 17. Tape Output. 18. Spherical Divergence (t**0.5 gain). 19. Dephase Filter (convert, using far-field, to digital minimum phase). 20. 2D SRME (Surface Related Multiple Elimination). 21. Removal of Spherical Divergence (t**0.5 gain). 22. Disk Output (backed-up). 23. Sort to 2D CMP domain. 24. Spherical Divergence (v**2 t gain). 25. NMO apply (SRME 1km Velocities). 26. Despike (2D CMP domain). 27. Hi-res Radon Demultiple (ramped 750-850ms). 28. NMO remove (SRME 1km Velocities). 29. Removal of Spherical Divergence (v**2 t gain). 30. Tape Output.-------- 31. Channel Summation (12.5m to 25m group). 32. Sort into Offset Planes. 33. Spherical Divergence (v**2 t gain). 34. NMO apply (SRME 1km Velocities). 35. Interpolation of Missing Offsets (xline dirn, upto 3-bin width, 3D only). 36. Trim On-mute. 37. Exponential Gain (0/0, 1500/4, 3000/14 ms/dB). 38. Removal of Spherical Divergence (v**2 t gain). 39. NMO remove (SRME 1km Velocities). 40. Bottom Taper (4900-5000ms). 41. PSTM Input Disk (backed-up).


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Migration and Post-migration Processing: 42. PSTM (approx. 60deg aperture in zone of interest; smoothed 1km PSTM Velocities). 43. Disk Output (backed-up). 44. Sort to CDP Domain. 45. NMO apply (50m Smoothed Dense Velocities). 46. Trim On-mute. 47. Despike (CDP domain). 48. Hi-res Radon Demultiple (ramped 800-1000ms). 49. Disk Output (backed-up). 50. Output to SEG Y Tape - Final PSTM Gathers (3590). 51. Outer Trace Mute. 52. Inner Trace Mute. 53. Stack (Plus Angle Stacks 5-20, 20-40deg and Difference Display). 54. Exponential Gain (0/0, 1500/0, 3000/6 ms/dB). 55. Disk Output (backed-up). 56. Sort to Xline (3D only). 57. Despike (Xline domain ; 3D only). 58. Deconvolution (3-gate design; 21 trace average). 59. Deterministic Zero Phasing Filter (designed from Far-field). 60. Polarity Reversal (to match previous 2D data). 61. Q Compensation (Phase only). 62. Sort to Inline (3D only). 63. Disk Output (backed-up). 64. Time-variant Bandpass Filters. 65. Residual Exponential Gain (0/0, 4000/3 ms/dB). 66. Trace Summation in Inline Direction (3D only; to 25m interval 25x25m). 67. Output to SEG Y Tape - Final 3D (Exabyte, 3590 and DVD).

Raw 3D (3590). Final Angles (Exabyte, 3590 and DVD). Final 2D (Exabyte, 3590 and DVD). Raw 2D (3590).

The Processes or Deliverables that are extra to Contract are highlighted.


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2.2 Pre-Migration Processing Details 1. Reformat field tapes The field data were reformatted, from PGS demultiplexed SEG-D 8036 format, into PGS internal format. 1392 data channels were output to 5120ms at a 2ms sample interval. 2. Recording Instrument Delay A recording instrument delay of 120ms was applied. 3. Datum Correction A gun and cable correction of +9ms was applied: 4. Tidal Correction Theoretical static corrections computed from tidal prediction tables were applied to data to account for tidal movements. The tables were obtained by PGS from MetOcean Engineers Pty Ltd. 5. Navigation/Seismic Merge The final P1/90 navigation data was transferred to the PGS Cube Manager processing system and subsequently merged with the seismic data on the basis of line and shot number. A 12.5 x 25m grid was used for the 3D Survey and this was extended to cover the 2D Survey. Near-trace displays and a volume were generated to verify the integrity of the navigation/seismic merges. Appendix 6 details processing grid and geodesy information. 6. Shot and Channel Edits Bad shots and channels, identified from the Onboard QC, were zeroed. 7. Tape Output To 3590E tape. 8. Low-cut and Anti-alias Filter Zero phase 4/18 90/72 (Hz/dBperOctave) Butterworth filter applied. 9. Swell Noise Attenuation (sail-line 1004, sequence 25 only) A program for the suppression of swell noise and interference noise called Seismic Interference Noise Killer (SINK) was applied to this one sequence. It was applied over a bandwidth of 0 to 15 Hz, modelled over 15 ensembles with a threshold scalar limit of 0.8 (only scalars below this were applied to the data). 10. Resample Resample from 2ms to 4ms. 11. NMO NMO correction applied using 1km velocities picked from the Reformat data. For the 3D, the velocities were picked from 2D lines from selected prime sail-line sequences.


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12. Trim Muting Preliminary muting to remove the precursor and direct and refracted arrivals from the shot records. The muting comprised an offset invariant on-mute at 84ms with a 16ms ramp and an offset variant mute of 368/0, 706/450, 2520/1500, 4500/2900 (offset/TWT) with a 100ms ramp. 13. Constrained De-spike Amplitude anomalies were computed over running spatial windows of 7 traces within each shot. Average amplitudes were computed using mean absolute values within a gate, scale factors then calculated based on the average amplitudes of the working trace and its neighbouring traces using the median values. A threshold scalar limit of 0.7 was applied (only scalars below this were applied to the data). 120ms time gates overlapping 50% were used. 14. Amplitude Compensation Gain correction of T1.0 was applied. 15. Inverse NMO NMO corrections applied in step 2.2.11 were removed. 16. Tau-P Predictive Deconvolution Shots separated into individual cables. Data padded to 6500ms pre-transform. Data transformed into 681 P-traces within range 680 to 680us/m. 1 window; 0.01% pw; operator 208ms + 32ms gap; design window 0-4000ms for all P values; application 0-6500ms. 17. Linear Tau-P Domain Mute To remove some vessel noise, direct arrivals, refractions and aliased noise, some muting within the Tau-P domain was applied. Flower shaped mute: 1/1300, 64/2240, 116/3100, 147/3800, 179/6000, 501/6000, 533/3800, 566/3100, 617/2240, 681/1300 (P trace seqno/Tau). Additionnal mute for aliased energy: 1/1700, 193/0, 681/0 (P trace seqno/Tau). Data transformed back into TX, cut to 5000ms and edits and trim muting re-applied. 18. Amplitude Compensation removal Removal of gain correction of T1.0 which was applied in step 2.2.14. 19. Tape Output To 3590E tape. 20. Amplitude Compensation Gain correction of T0.5was applied. 21. Dephase Filter A filter was designed to convert the modelled far-field signature (including instrument, source and streamer depth phase response) plus low cut/anti-alias filter and resample application, to its minimum phase equivalent.


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21. 2D Surface Related Multiple Elimination (SRME) SRME modeling and subtraction of multiple model from the traces. Filter design window : 400ms by 70 traces Filter length : 80ms Least squares adaptive multiple subtraction used. For the modelling of multiples the water bottom was muted out (150ms post nmo) beforehand to target the deeper multiples within the zone of interest. The velocity used for pre-SRME interpolation/extrapolation of missing traces was an average of the first pass and water velocity. 22. Amplitude Compensation removal Removal of gain correction of T0.5 which was applied in step 2.2.20. 23. Disk Output 24. 2nd Pass Velocity Analysis (1km grid) Post SRME data was input into Radon Demultiple and used to generate velocities: For the 3D, the velocities were picked from 2D lines from selected prime sail-line sequences. These velocities were picked using PGS interactive velocity analysis package, tVat. Iso-velocity displays, velocity time slices, NMO-corrected gathers and stack sections were used to QC velocity picks. 25. Sort to 2D CMP In the case of 3D, for each source/streamer component. 26. Amplitude Compensation Gain correction of V2T was applied (using 2nd pass velocities). 27. NMO NMO correction applied using 2nd pass 1km velocities. 28. Trim Muting Mute as in step 2.2.12 re-applied. 29. Constrained De-spike Amplitude anomalies were computed over running spatial windows of 7 traces within each 2D CMP. Average amplitudes were computed using mean absolute values within a gate, scale factors then calculated based on the average amplitudes of the working trace and its neighbouring traces using the median values. A threshold scalar limit of 0.7 was applied (only scalars below this were applied to the data). 120ms time gates overlapping 50% were used.


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30. First Pass High Resolution Radon Demulitple 2D CMP ordered data was represented as a series of parabolae and classified into primary events with little curvature and multiple events with considerable curvature. The latter group forms the multiple model, which was subsequently subtracted from the data. The following parameters were used for this process. Residual time range for data : -500 to 4360ms of move out at reference offset 4430m. Residual time range for multiples : 220 to 4360ms of move out at reference offset 4430m. Number of parabolae : 301 Application ramp : : 750ms(0%) 850ms(100%).

A wraparound 512ms AGC was used. 31. Inverse NMO NMO corrections applied in step 2.2.27 were removed. 32. Amplitude Compensation removal Removal of gain correction of V2T which was applied in step 2.2.26. 33. Tape Output To 3590E tape. 34. 3rd Pass PSTM Velocity Analysis (1km grid) Radon Demultiple data input, decimated to alternate channels. Bending ray Kirchhoff PSTM using the smoothed (2000m radius trim-mean) 2nd Pass velocities. Aperture (twt/half aperture) 100/130, 300/367, 500/568, 900/1171, 1400/2049, 1900/2379, 2500/3000, 3000/3500, 4000/3500, 5000/3000. These velocities were picked using PGS interactive velocity analysis package, tVat. Iso-velocity displays, velocity time slices, NMO-corrected gathers and stack sections were used to QC velocity picks 35. Channel Decimation Adjacent channel summation in shot domain resulting in an effective group interval of 25m for both 2D and 3D. 2nd Pass velocities applied for summation. 36. Amplitude Compensation Gain correction of V2T was applied (using 2nd pass velocities). 37. NMO NMO correction applied using 2nd pass 1km velocities.


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38. Sparse Radon Interpolation (SPRINT) applied to 3D data only. 3D data sorted into offset planes (121-4396/incr by 75m) for input into Sprint and later into the PSTM. SPRINT performs pre-stack interpolation as an alternative to flex binning. SPRINT is based on least squares sparse linear Radon transforms, and is applied to cross-lines for each offset class separately. The method uses the exact (irregular) trace positions, is not sensitive to weak or strong traces next to gaps and can interpolate beyond aliasing. SPRINT only interpolates coherent energy (with, in this case, three different dips in each spatial/temporal window), and as a consequence the interpolated data looks cleaner than the original data. The module has an option to add spectrally balanced noise such that in each window the interpolated data has a similarly shaped spectrum as the adjacent original traces. The following Sprint parameters were used for production : Spatial Window: 14 traces Temporal Window: 256 msec Table 1 : SPRINT parameters

Offsets Sprint Gap Comments 121 3 Traces 1st group 4396 3 Traces Last group

39. Trim Muting Mute as in step 2.2.12 re-applied. 40. Residual Gain Recovery The following gain was applied to balance the data in time prior to the PSTM- Table 2 : Residual Exponential gain

TWT ms Gain dB 0 0

1500 +4dB 3000 +14dB

41. Constrained De-spike Amplitude anomalies were computed over running spatial windows of 7 traces in the xline direction within the offset planes for the 3D and in the shot domain for 2D. Average amplitudes were computed using mean absolute values within a gate, scale factors then calculated based on the average amplitudes of the working trace and its neighbouring traces using the median values. A threshold scalar limit of 0.7 was applied (only scalars below this were applied to the data). 120ms time gates overlapping 50% were used. 42. Amplitude Compensation removal Removal of gain correction of V2T which was applied in step 2.2.36. 43. Inverse NMO NMO corrections applied in step 2.2.37 were removed.


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2.3 Migration and Post Migration Processing 1. Pre-Stack Kirchhoff 3D Migration (TAPSTM) The migration was run on offset planes from 121m to 4396m, incrementing by 75m, for the 3D volume and 108m to 4408m, incrementing by 50m for the 2D. The following parameters were used: Curved ray algorithm Aperture (twt/half aperture in m.) 100/130, 300/367, 500/568, 900/1171, 1400/2049, 1900/2379, 2500/3000, 3000/3500, 4000/3500, 5000/3000. Migrated velocity field was generated from the 3rd Pass Velocities in 2.2.34, trim-mean smoothed over a radius of 2.0km. These Migration Velocities, in Western 3D format, were shipped to the Client. 25x12.5 input/output bin spacing. 2. 4th Pass PSTM Velocity Analysis (0.5km grid) The input migrated gathers had Radon Demultiple applied to improve the resolution of the coherencies. 6th order velocities were picked using PGS interactive velocity analysis package, tVat. Iso-velocity displays, velocity time slices, NMO-corrected gathers and stack sections were used to QC velocity picks The approved velocities provided the control and the starting point for the Dense Velocity autopicking and the final angle mutes (3D only). For the 3D, these velocities were smoothed, both spatially with a 2km radius trim-mean filter, and temporally with a 1000ms boxcar filter, to produce the angle mutes for the angle stacks. 3. Dense Velocity Auto-picking The approved velocities from step 2.3.2 were used as a guide for autopicking coherencies which were derived from the migrated gathers above. Velocities were produced on a 50m x 50m grid, using the auto-picking tool in PGSs interactive velocity analysis package, tVat. The maximum deviation allowed was 3% from the interpolated guide function. The input, approved velocities from step 2.3.2, were maintained and not overwritten by the autopicking. 4. Dense Velocity Conditioning The dense velocities from step 2.3.3 were conditioned for final stacking in the following manner: Water bottom time/velocity replacement (WBT picked from data/1450m/s). Temporal resample at 50ms. RMS velocities smoothed over 200m radius with a 20% alpha-trim. Water bottom time/velocity replacement post-smoothing. These dense velocities, for stacking, were archived and shipped to the Client, in Western 3D format. 5. NMO Using the final velocity field from step 2.3.4, 6th order NMO corrections were applied 6. Trim Muting Mute as in step 2.2.12 re-applied.


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7. Constrained De-spike Amplitude anomalies were computed over running spatial windows of 7 traces within the CDP gathers. Average amplitudes were computed using mean absolute values within a gate, scale factors then calculated based on the average amplitudes of the working trace and its neighbouring traces using the median values. A threshold scalar limit of 0.7 was applied (only scalars below this were applied to the data). 120ms time gates overlapping 50% were used. 8. Second Pass High Resolution Radon Demulitple CDP ordered data was represented as a series of parabolae and classified into primary events with little curvature and multiple events with considerable curvature. The latter group forms the multiple model, which was subsequently subtracted from the data. The following parameters were used for this process. Residual time range for data : -500 to 4360ms of move out at reference offset 4430m. Residual time range for multiples : 130 to 4360ms of move out at reference offset 4430m. Number of parabolae : 301 Application ramp : : 800ms(0%) 1000ms(100%).

A wraparound 512ms AGC was used. 9. Migrated Gather SEG-Y Output PSTM gathers were archived on 3590B tapes in SEG-Y format. These tapes were sent to the Client. Tape listings for these shipments can be found in Appendix 7. 10. Mutes The following mutes were used to produce the stack data:- Full offsets stacks (2D and 3D) - Inner and Outer mutes in Tables 8 and 9 Near offset volume for 3D - Angle Mutes 5-20 degrees Far offsets volume for 3D - Angle Mutes 20-40 degrees Incident angle mutes were computed from 0.5km velocities from step 2.3.2 after trim-mean smoothing over a 2.0 km radius followed by temporal boxcar smoothing over 1000ms. The curved ray option instantaneous Dixs equation was used. Table 3 : Outer Mute applied (ramp=20ms)

Offset (m) TWT (ms)215 2 600 500 871 1000 1321 1600 2221 2400 4400 4000

Table 4 : Inner Mute applied(ramp=20ms)

Offset (m) TWT (ms)140 0 141 600 300 800 301 4980


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11. Stacks One stack was produced for each 2D Line and three volume stacks were produced for the 3D according to the mutes described in step 2.3.10. 12. Raw Stack SEG-Y Output Two raw stack products were archived in SEG-Y format. 3D Raw Stack (Full Offsets) 2D Raw Stacks (Full Offsets) These products were sent to the Client. Listings for these shipments can be found in Appendix 7. 13. Ensemble Balance for Acquisition Footprint 3D only Amplitude anomalies were computed over running spatial windows of 7 traces in the Xline direction. Average amplitudes were computed using mean absolute values within a gate, scale factors then calculated based on the average amplitudes of the working trace and its neighbouring traces using the median values. Scalars within the limits of 1.0-3.0 were applied to remove low-amplitude bands at sail-line edges 120ms time gates overlapping 50% were used. 14. Predictive Deconvolution 3 window, 21 trace running design in Xline direction, 0.01% pw. Operators 100ms + 24ms gap, 100ms + 24ms gap and 84ms + 40ms gap. Design windows 50-700, 1100-2700ms, 2500-4400ms. Application windows 0-500ms, 700-2500ms, 2700-5000ms. 15. Zero Phasing Filter A filter was designed to convert the modelled far-field signature (including instrument, source and streamer depth phase response) plus low cut/anti-alias filter, resample application and dephase filter, to its zero phase equivalent. The polarity was reversed after the filter application to match the existing 2D data in the Clients Archive (approx. positive standard polarity for zero phase). 14. Q Compensation Phase-only Q compensation was applied with the following parameters:- Q value of 110 Amplitude threshold:15dB Amplitude rolloff: 0B/oct Reference frequency : 50Hz 15. Xline Summation Adjacent summation of CDP traces in the subline direction resulting in a 25x25m bin spacing.


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16. Time-variant Bandpass Filtering The following bandpass filters were applied to the data:- Table 5 : Time-variant Bandpass Filters

TWT ms Filter(Hz/dBperOct.) 0-800 8/18 80/66

1200-1800 8/18 70/59 2000-2800 8/18 60/53 3000-3800 7/18 50/46 4000-5000 6/18 40/40

17. Residual Gain Recovery The following final residual gain was applied to balance the data in time:- Table 6 : Final Residual Exponential gain

TWT ms Gain dB 100 0 4000 +3dB

18. Final Stack SEG-Y Output Five final stack products were archived in SEG-Y format. 3D Final Stack (Full Offsets) 3D Final Stack (Near Angle) 3D Final Stack (Far Angle) 3D Final Difference Stack (Far minus Near) 2D Final Stacks (Full Offsets) These products were sent to the Client. Listings for these shipments can be found in Appendix 7.


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3. VELOCITY ANALYSIS

3.1 Velocity Passes First Pass Velocity Analysis - 1km interval from the Reformat data, using 6th order nmo. For the 3D data the velocities were picked from 2D CMP gathers from selected prime sail-line sequences at an approximate 1km interval. Second pass Velocity Analysis - 1km interval from the SRME data, with radon demultiple applied, using 6th order nmo. For the 3D data the velocities were picked from 2D CMP gathers from selected prime sail-line sequences at an approximate 1km interval. Third Pass Velocity Analysis - 1km interval from the first pass radon demultiple data that was pre-stack migrated onto the velocity locations. For the 3D data, the velocities were picked from 3D migrated gathers on a regular 1km grid throughout the Survey. A smoothed version of these velocities represented the Final Migration Velocities for the data (2.3.1) which were shipped to the Client. Fourth Pass Velocity Analysis - 0.5km interval from the PSTM gathers with radon demultiple applied, using 6th order nmo. For the 3D, a smoothed version of these velocities was used to produce the angle mutes for the Near and Far Angle Stacks (2.3.10). Dense Velocity Analysis 50x50m interval from the PSTM gathers with radon demultiple applied, using 6th order nmo. The fourth pass velocities acted as a guide for autopicking the semblances. A 3% maximum deviation, from the guide function, was allowed in the autopicking. These velocities were smoothed as described in 2.3.4 before being used to stack the data and shipped to the Client as the Final Stacking Velocities. All the velocity analyses above were performed using PGSs interactive velocity analysis package, tVat. Iso-velocity displays, velocity time slices, NMO-corrected gathers and stacked sections were used to QC the velocity picks.


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3.2 3D Velocity Timeslices

Third Pass Timeslice, 1000ms


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Third Pass Timeslice, 1000ms, smoothed for Migration


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Dense Velocity Pass Timeslice, 1000ms, used for stacking


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4. PARAMETER TESTING

Tests results were reviewed interactively within PGSs 2Dviewer program, often with the Benaris Client Representative, Mr. Ron Angove. Powerpoints, summarising the tests, were also sent to the same Client Representative in Melbourne. The tests produced are summarised by the following Test Log and by linked Powerpoints:-


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Powerpoints relevant to Tests and Quality Control hyperlinked:- 01_SR_SRME.ppt, 02_SRME.ppt, 03_SRME.ppt, 03a_SRME.ppt, 04_VEL2.ppt.


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Powerpoints relevant to Tests and Quality Control hyperlinked:- 05_Demult.ppt, 06R_Demult.ppt, 07_Shotcomp.ppt. The Powerpoint 06R_Demult.ppt was a replacement for the original 06.. referred to in the Test Log. This was produced when a geometry error was discovered, and corrected for, in the 2D stack data. The 07_Shotcomp.ppt shows the amount of noise in the original reformat shot data and the gradual reduction of this noise through the processes upto the first pass of radon demultiple.


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Powerpoints relevant to Tests and Quality Control hyperlinked:- 08_VEL2_3DPSTMQC.ppt, 09_VEL3_slices.ppt, 10_3DPSTMQC_slices.ppt, 11_3DPSTMQC_stks.ppt, 12_VEL4_slices.ppt, 13_2DPSTMQC_stks.ppt.


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Powerpoints relevant to Tests and Quality Control hyperlinked:- 12a_VEL4_dense_slices.ppt, 14_3DPSTM_anggaths.ppt, 14a_3DPSTM_anggaths.ppt, 19_RAW_ANGSTK.ppt, 15_Post-vel4comp_stks.ppt. 14a is a revision of 14 Client requested example gathers away from the volcanics. .


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Powerpoints relevant to Tests and Quality Control hyperlinked:- 16_ZP_Q_comp.ppt, .


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Powerpoints relevant to Tests and Quality Control hyperlinked:- 17_DAS.ppt, 18_BIN_SIZE.ppt, 20_FINAL_stks.ppt 20 is a review of the Raw versus Final Stack product for selected lines. .


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5. PERSONNEL

Client Representation (Benaris Petroleum N.V.):- The Client was represented by Ron Angove Geophysicist (Benaris) PGS Data Processing Representation:- The PGS Data Processing personnel involved in the processing of this data were Rod Reed Area Processing Manager (AP Region)

Denny Rompotes Processing Manager Dave Mellors Processing Supervisor Lana Abzalov Senior Geophysicist Paul Bouloudas Velocity QA Supervisor Terry Allen Area Geophysicist


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6. APPENDICES

6.1 Appendix 1 Aquisition Parameters PJ3D Survey 3D Definition: Acquisition Mode : 3D Shot interval (flip-flop) : 18.75 m Line orientation : 307.9 or 127.9 Acquisition bin size : 25 x 6.25 m Nominal fold : 58 Nominal near offset : 94 m Nominal offset spacing : 75 m Energy Source Source type : Tuned Air Gun Array (Bolt guns) Number of sources : 2 Air pressure : 1800 psi Volume : 2500 cu.in. Source separation : 50 m Number of sub-arrays : 2x3 Sub-array separation : 10 m Source length : 14 m Source depth : 6 m Gun synchronisation : 90% within +/-1 ms; 10% within +/-1.5 ms Streamer Number of Streamer : 4 Streamer length : 4350 m Streamer separation : 100 m Streamer depth : 8 m +/- 1 m Group length : 12.5 m Number of groups/streamer : 348 Data Recording System : Syntrak 960-24 Live channels : 1392 Auxiliary channels : 48 Record length : 5.12 sec Sampling rate : 2 ms Lo-cut filter Hydrophone : 3Hz, slope 12dB/octave Hi-cut filter Hydrophone : 206Hz, slope 276 dB/octave Format : SEGD 8036, rev. 1.0 Media : 3590 tapes Gravity : N/A


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PJ2D Survey 2D Definition: Acquisition Mode : 2D Shot interval (single source) : 25 m Line orientation : see Fig. 2 Acquisition bin size : 6.25 m Nominal fold : 87 Nominal near offset : 94 m Nominal offset spacing : 50 Energy Source Source type : Tuned Air Gun Array (Bolt guns) Number of sources : 1 (starboard) Air pressure : 1800 psi Volume : 2500 cu.in. Number of sub-arrays : 3 Sub-array separation : 10 m Source length : 14 m Source depth : 6 m Gun synchronisation : 90% within +/-1 ms; 10% within +/-1.5 ms Streamer Number of Streamer : 4 (Inner Stb, ch349-696, used in processing) Streamer length : 4350 m Streamer separation : 100 m Streamer depth : 8 m +/- 1 m Group length : 12.5 m Number of groups/streamer : 348 Data Recording System : Syntrak 960-24 Live channels : 1392 Auxiliary channels : 48 Record length : 5.12 sec Sampling rate : 2 ms Lo-cut filter Hydrophone : 3Hz, slope 12dB/octave Hi-cut filter Hydrophone : 206Hz, slope 276 dB/octave Format : SEGD 8036, rev. 1.0 Media : 3590 tapes Gravity : N/A


Page 38

6.2 Appendix 2 Line Naming Conventions

Each Sail Line had a unique number. The Sail Line Numbering System is designed as follows:

AAAAXXXXBYX

where

AAAA survey identifier, in this case PJ05 XXXX four digit line no B type of line, P for Prime, J for Infill, R for Reshoot Y pass no X Sequence number

The number: PJ051156R2002 shows that it is the second re-shoot pass on Sail Line PJ051156.

Columns covered by a specific Line will be from Line no -3 to Line no +4

Example: Sail Line 1156 covers CMP columns 1153 to 1160

The Shot Point was defined as the nominal CMP for the first group.


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6.3 Appendix 3 Field Tape Line Listings Table 7 : Field Tape Data Pre-processed for PJ 3D Project

LINE NAME SEQ F_SHOT L_SHOT KMS 1 PJ051004P1 25 885 1804 17.25 2 PJ051012P1 44 885 1805 17.27 3 PJ051020P1 50 885 1805 17.27 4 PJ051028P1 52 885 1805 17.27 5 PJ051036P1 58 885 1805 17.27 6 PJ051044P1 61 886 1805 17.25 7 PJ051052J3 76 886 1806 17.27 8 PJ051052P1 65 886 1806 17.27 9 PJ051060J1 74 886 1806 17.27 10 PJ051060P1 72 886 1806 17.27 11 PJ051068P1 68 886 1806 17.27 12 PJ051076P1 63 887 1806 17.25 13 PJ051084P1 56 887 1806 17.25 14 PJ051092P1 48 887 1807 17.27 15 PJ051100P1 46 887 1807 17.27 16 PJ051108J1 42 888 1807 17.25 17 PJ051108P1 40 888 1807 17.25 18 PJ051116J1 38 888 1807 17.25 19 PJ051116P1 36 888 1807 17.25 20 PJ051124P1 34 888 1807 17.25 21 PJ051132P1 32 888 1807 17.25 22 PJ051140P1 30 888 1808 17.27 23 PJ051148P1 28 889 1808 17.25 24 PJ051156P2 26 889 1808 17.25 25 PJ051164P1 22 889 1808 17.25 26 PJ051172J1 20 889 1808 17.25 27 PJ051172P1 18 889 1808 17.25 28 PJ051180P1 17 890 1809 17.25 29 PJ051188P1 15 890 1809 17.25 30 PJ051196P1 13 890 1809 17.25 31 PJ051204P1 11 890 1809 17.25 32 PJ051212P1 10 891 1809 17.23 33 PJ051220P1 8 891 1810 17.25 34 PJ051228P2 6 891 1810 17.25 35 PJ051236P1 2 891 1810 17.25 36 PJ051244P1 54 891 1810 17.25 37 PJ051252P1 60 892 1810 17.23 38 PJ051260J1 80 892 1811 17.25 39 PJ051260P1 78 892 1811 17.25 40 PJ051268J1 79 1008 1927 17.25 41 PJ051268P1 77 1008 1927 17.25 42 PJ051276P1 75 1008 1927 17.25 43 PJ051284P1 71 1009 1927 17.23 44 PJ051292J1 69 1009 1927 17.23 45 PJ051292P1 64 1009 1927 17.23 46 PJ051300P1 62 1009 1928 17.25 47 PJ051308P1 59 1009 1928 17.25 48 PJ051316P1 57 1010 1928 17.23 49 PJ051324P1 47 1010 1928 17.23 50 PJ051332P1 45 1010 1928 17.23


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51 PJ051340J1 43 1010 1928 17.23 52 PJ051340P1 41 1010 1928 17.23 53 PJ051348P1 39 1010 1929 17.25 54 PJ051356P1 37 1011 1929 17.23 55 PJ051364P1 35 1011 1929 17.23 56 PJ051372P1 33 1011 1929 17.23 57 PJ051380P1 31 1011 1929 17.23 58 PJ051388P1 29 1012 1930 17.23 59 PJ051396P1 27 1012 1930 17.23 60 PJ051404P1 23 1012 1930 17.23 61 PJ051412P1 21 1012 1930 17.23 62 PJ051420J1 19 1013 1930 17.21 63 PJ051420P1 14 1013 1930 17.21 64 PJ051428P1 12 1013 1931 17.23 65 PJ051436P1 9 1013 1931 17.23 66 PJ051444P1 7 1014 1931 17.21 67 PJ051452P1 5 1013 1931 17.23 68 PJ051460P1 3 1014 1931 17.21 69 PJ051468P1 16 1014 1932 17.23 70 PJ051476P1 49 1014 1932 17.23 71 PJ051484P1 51 1014 1932 17.23 72 PJ051492P1 53 1015 1932 17.21 73 PJ051500J1 73 1015 1932 17.21 74 PJ051500P1 55 1015 1932 17.21 75 PJ051508P1 66 1015 1932 17.21 76 PJ051516P1 1 1001 1919 17.23

Sail-Line KM Total 1310.46


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Table 8 : Field Tape Data Pre-processed for PJ 2D Project

LINE NAME SEQ F_SHOT L_SHOT KMS 1 PJ2D-2001 82 1001 2256 31.40 2 PJ2D-2002 86 914 1333 10.50 3 PJ2D-2003 103 1001 1634 15.85 4 PJ2D-2004 88 914 1340 10.68 5 PJ2D-2005 83 914 1971 26.45 6 PJ2D-2006 90 914 1257 8.60 7 PJ2D-2007 81 914 1966 26.33 8 PJ2D-2008 92 914 1347 10.85 9 PJ2D-2009 84 1001 2118 27.95 10 PJ2D-2010 85 1001 1519 12.98 11 PJ2D-2012 87 1001 1590 14.75 12 PJ2D-2014 89 1001 1514 12.85 13 PJ2D-2016 91 1001 1503 12.58 14 PJ2D-2018 93 1001 1601 15.03 15 PJ2D-2020 94 914 1642 18.23 16 PJ2D-2022 102 914 1484 14.28 17 PJ2D-2024 95 1001 1742 18.55 18 PJ2D-2026 101 1001 1590 14.75 19 PJ2D-2028 96 914 1561 16.20 20 PJ2D-2030 98 914 1570 16.43 21 PJ2D-2032 100 914 1574 16.53 22 PJ2D-2034 97 1001 1529 13.23 23 PJ2D-2036 99 1001 1632 15.80

Line KM Total 380.75


Page 42

6.4 Appendix 4 Dephase Filter Designed by PGS Minimum Phasing Filter Number of samples: 101 Zero Time Reference Sample 21 Time sample increment: 4 msec Table 9 : Coefficient Listing

Sample No. Time (ms) Value Sample No. Time (ms) Value 1 -80 1.11356E-03 88 268 2.18300E-032 -76 1.85868E-03 89 272 5.67800E-033 -72 1.75412E-03 90 276 -3.80332E-034 -68 -3.51824E-03 91 280 3.08200E-035 -64 1.09180E-02 92 284 -3.47188E-036 -60 -2.24448E-02 93 288 -3.28772E-037 -56 1.74252E-02 94 292 -4.25480E-048 -52 -3.39732E-02 95 296 -2.88856E-039 -48 -5.81400E-03 96 300 -1.92992E-0310 -44 -2.73824E-02 97 304 -4.90800E-0411 -40 -5.27840E-02 98 308 -4.85720E-0312 -36 -3.18608E-02 99 312 4.07680E-0313 -32 -9.85480E-02 100 316 -1.38732E-0314 -28 -6.80080E-02 101 320 2.19392E-0315 -24 -1.45696E-01 16 -20 -1.23124E-01 17 -16 -2.01560E-01 18 -12 -2.12444E-01 19 -8 -2.96916E-01 20 -4 -1.36996E-01 21 0 6.08040E-01 22 4 2.29188E-01 23 8 -2.34332E-01 24 12 9.03760E-02 25 16 1.38924E-02 26 20 -5.62840E-02 27 24 3.93912E-02 28 28 3.51156E-03 29 32 -1.39448E-02 30 36 2.46104E-02 31 40 6.73560E-03 32 44 -7.15920E-03 33 48 2.84980E-02 34 52 -1.74184E-03 35 56 5.94240E-03 36 60 2.34068E-02 37 64 -5.82080E-03 38 68 1.61768E-02 39 72 1.22828E-02 40 76 -3.06556E-03


Page 43

41 80 1.89368E-02 42 84 2.08412E-03 43 88 2.82708E-03 44 92 1.52020E-02 45 96 -3.97508E-03 46 100 8.53360E-03 47 104 7.26400E-03 48 108 -4.37720E-03 49 112 1.05236E-02 50 116 -8.65000E-04 51 120 -1.00536E-03 52 124 7.67320E-03 53 128 -5.68400E-03 54 132 2.56956E-03 55 136 1.89888E-03 56 140 -6.41600E-03 57 144 3.62896E-03 58 148 -3.91680E-03 59 152 -4.52000E-03 60 156 1.58176E-03 61 160 -7.36560E-03 62 164 -2.28924E-03 63 168 -2.06952E-03 64 172 -7.95920E-03 65 176 -1.27972E-03 66 180 -5.54960E-03 67 184 -6.61960E-03 68 188 -1.92960E-03 69 192 -7.61600E-03 70 196 -4.73160E-03 71 200 -3.79936E-03 72 204 -7.63640E-03 73 208 -3.72840E-03 74 212 -5.15200E-03 75 216 -6.38440E-03 76 220 -3.45900E-03 77 224 -4.40240E-03 78 228 -5.97200E-03 79 232 -1.89236E-04 80 236 -5.55280E-03 81 240 -8.63960E-04 82 244 1.02452E-03 83 248 -3.56624E-03 84 252 6.77000E-03 85 256 -1.03332E-03 86 260 8.43000E-03 87 264 2.41448E-03


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6.5 Appendix 5 Zero Phasing Filter Designed by PGS Zero Phasing Filter Number of samples: 101 Zero Time Reference Sample 48 Time sample increment: 4 msec Table 10 : Coefficient Listing

Sample No. Time (ms) Value Sample No. Time (ms) Value 1 -188 6.42640E-04 88 160 -8.18640E-042 -184 -5.67720E-04 89 164 -2.21568E-043 -180 2.95384E-03 90 168 2.82808E-034 -176 -1.64084E-03 91 172 -2.20580E-035 -172 5.29680E-03 92 176 1.55324E-036 -168 2.88804E-04 93 180 5.88000E-047 -164 4.24120E-03 94 184 -1.67952E-038 -160 6.46120E-03 95 188 2.07812E-039 -156 2.69728E-03 96 192 -1.42492E-0310 -152 1.05012E-02 97 196 2.53976E-0411 -148 7.67840E-03 98 200 4.96720E-0412 -144 9.00520E-03 99 204 -9.96360E-0413 -140 1.62440E-02 100 208 6.52520E-0414 -136 1.06584E-02 101 212 -4.23160E-0415 -132 1.82920E-02 16 -128 2.09772E-02 17 -124 1.68012E-02 18 -120 2.89996E-02 19 -116 2.47600E-02 20 -112 2.71544E-02 21 -108 3.86324E-02 22 -104 2.87168E-02 23 -100 4.20360E-02 24 -96 4.27680E-02 25 -92 3.88648E-02 26 -88 5.30760E-02 27 -84 4.74120E-02 28 -80 5.07040E-02 29 -76 5.82680E-02 30 -72 5.99840E-02 31 -68 4.36320E-02 32 -64 7.66520E-02 33 -60 5.10640E-02 34 -56 3.74880E-02 35 -52 1.02604E-01 36 -48 -1.25968E-02 37 -44 9.07560E-02 38 -40 6.37280E-02 39 -36 -4.60000E-02 40 -32 1.66976E-01


Page 45

41 -28 -4.29440E-02 42 -24 -3.23136E-02 43 -20 2.23620E-01 44 -16 -2.38040E-01 45 -12 -6.38680E-01 46 -8 -2.31524E-01 47 -4 2.19212E-01 48 0 -2.12992E-03 49 4 4.44200E-02 50 8 8.93200E-02 51 12 -5.26040E-02 52 16 1.05580E-01 53 20 -3.33584E-02 54 24 2.94792E-02 55 28 2.26752E-02 56 32 -2.46520E-02 57 36 2.55444E-02 58 40 -2.33872E-02 59 44 6.46360E-03 60 48 -1.10320E-02 61 52 4.93680E-03 62 56 7.98880E-03 63 60 6.60160E-03 64 64 2.01416E-02 65 68 -7.21360E-03 66 72 2.49708E-02 67 76 -4.60840E-03 68 80 1.03592E-02 69 84 1.12104E-02 70 88 -5.11720E-03 71 92 1.45912E-02 72 96 -6.04080E-04 73 100 2.17984E-03 74 104 1.00896E-02 75 108 -2.89820E-03 76 112 6.90800E-03 77 116 5.08800E-03 78 120 -1.62248E-03 79 124 8.18760E-03 80 128 1.25400E-04 81 132 1.15080E-03 82 136 5.87360E-03 83 140 -2.26052E-03 84 144 3.42476E-03 85 148 2.22692E-03 86 152 -1.98828E-03 87 156 3.99840E-03


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6.6 Appendix 6 Geodesy and Processing Grid Details Survey Datum Name : GDA94 Ellipsoid : GRS 1980 Semi Major Axis : 6 378 137 m 1/Flattening : 298.2572221 Map Projection Projection : Transverse Mercator Projection System : UTM, Zone 55 Central Meridian : 147o E. Scale Factor on Central Meridian : 0.9996 Latitude of Origin : 0o False Northing : 10000000 m False Easting : 500000 m 3D Processing grid (12.5x25m Grid) Subline range : 961 to 1560 inc 1; migration output data range 1000 to 1520 inc 1 Xline range : 681 to 2865 inc 1; migration output data range 1100 to 2450 inc 1 Origin 453446.764 / 5503169.882 Subline Compass Angle 307.93deg Bin Size between sublines: 25.0

between xlines: 12.5 Used for 3D Gather and Raw Stack Outputs. Final Stack 3D SEG Y Output grid (post-xline summation 25x25m Grid) Subline range : 961 to 1560 inc 1; Output data range 1000 to 1520 inc 1 Xline range : 340 to 1432 inc 1; Output data range 576 to 1199 inc 1 Origin 453461.539 / 5503158.338 Subline Compass Angle 307.93deg Bin Size between sublines: 25.0

between xlines: 25.0 Used for Final 3D Outputs, including the 3D Migration and Dense Stacking Velocities and the P6/98 Bin Coordinate file..


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6.7 Appendix 7 Deliverables Tape Listing Table 11 : PJ 3D Pre-STM Gather SEGY

SURVEY: PJ 3D

DATA: PreSTM Gather SEGY

Shipment Date: 23 March 2006 Transmittal : #06-037

PROJECT DATASET TAPE NO. INLINE RANGE XLINE RANGE MEDIA

1 PJ 3D 3D Raw Gath PJ3DS008 1000-1020 1152-2398 3590 2 PJ 3D 3D Raw Gath PJ3DS009 1021-1040 1152-2398 3590 3 PJ 3D 3D Raw Gath PJ3DS010 1041-1060 1152-2398 3590 4 PJ 3D 3D Raw Gath PJ3DS011 1061-1080 1152-2398 3590 5 PJ 3D 3D Raw Gath PJ3DS012 1081-1100 1152-2398 3590 6 PJ 3D 3D Raw Gath PJ3DS013 1101-1120 1152-2398 3590 7 PJ 3D 3D Raw Gath PJ3DS014 1121-1140 1152-2398 3590 8 PJ 3D 3D Raw Gath PJ3DS015 1141-1160 1152-2398 3590 9 PJ 3D 3D Raw Gath PJ3DS016 1161-1180 1152-2398 3590 10 PJ 3D 3D Raw Gath PJ3DS017 1181-1200 1152-2398 3590 11 PJ 3D 3D Raw Gath PJ3DS018 1201-1220 1152-2398 3590 12 PJ 3D 3D Raw Gath PJ3DS019 1221-1240 1152-2398 3590 13 PJ 3D 3D Raw Gath PJ3DS020 1241-1260 1152-2398 3590 14 PJ 3D 3D Raw Gath PJ3DS021 1261-1280 1152-2398 3590 15 PJ 3D 3D Raw Gath PJ3DS022 1281-1300 1152-2398 3590 16 PJ 3D 3D Raw Gath PJ3DS023 1301-1320 1152-2398 3590 17 PJ 3D 3D Raw Gath PJ3DS024 1321-1340 1152-2398 3590 18 PJ 3D 3D Raw Gath PJ3DS025 1341-1360 1152-2398 3590 19 PJ 3D 3D Raw Gath PJ3DS026 1361-1380 1152-2398 3590 20 PJ 3D 3D Raw Gath PJ3DS027 1381-1400 1152-2398 3590 21 PJ 3D 3D Raw Gath PJ3DS028 1401-1420 1152-2398 3590 22 PJ 3D 3D Raw Gath PJ3DS029 1421-1440 1152-2398 3590 23 PJ 3D 3D Raw Gath PJ3DS030 1441-1460 1152-2398 3590 24 PJ 3D 3D Raw Gath PJ3DS031 1461-1480 1152-2398 3590 25 PJ 3D 3D Raw Gath PJ3DS032 1481-1500 1152-2398 3590 26 PJ 3D 3D Raw Gath PJ3DS033 1501-1520 1152-2398 3590


Page 48

Table 12 : PJ 2D Pre-STM Gather SEGY

SURVEY: PJ 2D

DATA: PreSTM Gather SEGY


PROJECT DATASET TAPE NO. 2D LINES MEDIA

1 PJ 2D 2D Raw Gath. PJ3DS034 2001082 3590(tar) 2002086 2003103 2004088 2005083 2006090 2007081 2008092 2 PJ 2D 2D Raw Gath PJ3DS035 2009084 3590(tar) 2010085 2012087 2014089 2016091 2018093 2020094 2022102 3 PJ 2D 2D Raw Gath PJ3DS036 2024095 3590(tar) 2026101 2028096 2030098 2032100 2034097 2036099


Page 49

Table 13 : PJ 3D Raw and Final Migration Stack SEGY

SURVEY: PJ 3D

DATA: Raw and Final Migration Stack SEGY



1 PJ 3D 3D Raw Migration(full offset) PJ3DS004 1000-1520 1152-2398 3590 2 PJ 3D 3D Final Migration(full offset) PJ3DS001 1000-1520 576-1199 8mm 3 PJ 3D 3D Final Migration(Angle 5-20) PJ3DS002 1000-1520 576-1199 8mm 4 PJ 3D 3D Final Migration(Angle 20-40) PJ3DS003 1000-1520 576-1199 8mm 5 PJ 3D 3D Final Migration(Angle Difference) PJ3DS005 1000-1520 576-1199 8mm


6

PJ 3D 3D Final Migration(full offset) 3D Final Migration(Angle 5-20)

3D Final Migration(Angle 20-40) 3D Final Migration(Angle Difference)

PJ3DS037

1000-1520 576-1199 3590(tar)


7 PJ 3D 3D Final Migration(full offset) 1000-1520 576-1199 DVD

8

PJ 3D 3D Final Migration(Angle 5-20) 3D Final Migration(Angle 20-40)

1000-1520 576-1199 DVD

9 PJ 3D 3D Final Migration(Angle Difference)

1000-1520 576-1199 DVD

NB. The Angle Difference Datasets were supplied as Near minus Far, whereas the Client wanted Far minus Near. 2 copies of the latter were sent, as replacements (on DVD only), on 11/05/06 (Transmittal 06-050).


Page 50

Table 14 : PJ 2D Raw and Final Migration Stack SEGY

SURVEY: PJ 2D

DATA: Raw and Final Migration Stack SEGY



1 PJ 2D 2D Raw Migration(full offset) PJ3DS007 3590(tar)2 PJ 2D 2D Final Migration(full offset) PJ3DS006 8mm(tar)


2 PJ 2D 2D Final Migration(full offset)

PJ3DS038 3590(tar)


3 PJ 2D 2D Final Migration(full offset)

DVD


Page 51

Table 15 : PJ 2D and PJ 3D Velocities and Coordinates

SURVEY: PJ 3D/2D

DATA: Velocities and Coordinates



1 PJ 3D/2D 3D and 2D Migration and Dense

Stacking Velocities CD 2 PJ 2D 2D Lines - SP to CDP relationship CD

Shipment Date: 27 April 2006 Transmittal : #06-044

3 PJ 3D 3D Bin Coordinates (P6/98 format)

3D Area Polygon(E/N and Lat/Lon) CD Table 16 : PJ 2D Paper Displays and equivalent CGMs

SURVEY: PJ 2D

DATA: Paper Displays and CGM files

Shipment Date: 27 April 2006 Transmittal : #06-044


1 PJ 2D Final Migration Displays Paper 1 PJ 2D CGM files for above Displays CD


Page 52

Table 17 : PJ 2D Line Ranges

LINE XLINE (SHOT) RANGE

1 2001082 1001-2256 2 2002086 914-2256 3 2003103 1001-1634 4 2004088 914-1340 5 2005083 914-1971 6 2006090 914-1257 7 2007081 914-1966 8 2008092 914-1347 9 2009084 1001-2118 10 2010085 1001-1519 11 2012087 1001-1590 12 2014089 1001-1514 13 2016091 1001-1503 14 2018093 1001-1601 15 2020094 914-1642 16 2022102 914-1484 17 2024095 1001-1742 18 2026101 1001-1590 19 2028096 914-1561 20 2030098 914-1570 21 2032100 914-1574 22 2034097 1001-1529 23 2036099 1001-1632


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6.8 Appendix 8 EBCDIC & Trace Headers from SEG Y Deliverables

PJ 3D Gathers C 1 CLIENT :BENARIS PETROLEUM N.V SURVEY BLOCK PJ3D, BASS STRAIT, AUSTRALIA C 2 INLINES 1000-1020; XLINES :1152-2398 C 3 AREA :T/39 P C 4 DATA-SET :PSTM GATH (OFFSETS 196-4396/75) C 5 C 6 TAPE NO: PJ3DS008 C 7 ACQ PREFIX :PJ05 PROCESSED DATE :JANUARY-MARCH 2006 C 8 SHOT/RCV INTERVAL :18.75/12.5 NO.GUNS/CABLES :02/04 C 9 CABLE LENGTH :4350M RCVS PER CABLE :348 C10 GUN SEPARATION :50M CABLE SEPARATION :100M C11 PORT SOURCE NO:ARRAY-2 STARBOARD SOURCE NO.:ARRAY-1 C12 FAR PORT CABLE NO.:STREAMER-4 FAR STARBOARD CABLE NO. :STREAMER-1 C13 MIN OFFSET :94M MAX OFFSET :4435M C14 SPHEROID OF REF :WGS84 UTM ZONE :55 C15 COORDINATES UNITS :METRES PROCESSED DATUM :WGS84 C16 BINNING ORIGIN (E,N) 453446.763892; 5503169.8822769998 C17 BINNING ORIGIN (XLINE,INLINE) 681,961 C18 NO. XLINES/INLINES:2185/600 XLINE/INLINE INT :12.5/25.0 C19 GRID MIN/MAX XLINE:681/2865 GRID MIN/MAX INLINE:961/1560 C20 ROTATION ANGLE :308 (DEGR) (CLOCKWISE=POSITIVE) C21 SAMPLE RATE (uS) :4000 MAX TIME (MS) :5000 C22 ======PROCESSED ONSHORE BY PGS DATA PROCESSING IN PERTH========= C23 REFORMAT; TRACE EDITS, C24 RECORDING INSTRUMENT DELAY -120ms, GUN/CABLE STATIC CORRECTION, C25 TIDAL STATIC CORRECTION; NAVIGATION MERGE; 1st PASS VELS 1KM GRID; C26 TAU-P DOMAIN DBS AND MUTE; DEPHASE FILTER; C27 SRME (SURFACE RELATED MULTIPLE ELIMINATION) USING 1st PASS VELOCITY; C28 2nd PASS VELS 1KM GRID; HIGH-RES PARABOLIC RADON DEMULTIPLE; C29 CHANNEL SUMMATION(12.5 to 25m); SORT TO OFFSET PLANES; C30 XLINE INTERPOLATION OF MISSING OFFSET-TRACES; C31 3rd PASS PSTM-VELS 1KM GRID; C32 KIRCHHOFF 3D TAPSTM - CURVED RAY, 100% 3rd PASS VELS SMOOTHED 2KM; C33 SORT TO CDP; 4th PASS PSTM-VELS 0.5KM GRID; DENSE VELS 50m; C34 HIGH-RES PARABOLIC RADON DEMULTIPLE; OUTER/INNER MUTES; C35 C36 C37 =========OUTPUT TO SEGY - 12.5x25m BINS (MIN. PHASE)=========== C38 C39 C40 END EBCDIC Tape Binary Header Summary Starting Byte Format Name Origin Name Origin Type Origin Format Value (1) INT4 LineArchiveNum 1 ConstantValue Integer 1 (5) INT4 LineNo 0 ConstantValue Integer 0 (9) INT4 ReelNo ReelNo InternalData Integer 8 (13) INT2 NoTraceRecord NoTraceRecord InternalData Integer 58 (15) INT2 NoAuxTraceRecord 0 ConstantValue Integer 0 (17) INT2 SampInt SampInt InternalData Integer 4000 (19) INT2 SampIntOrig 2000 ConstantValue Integer 2000 (21) INT2 NoSamp NoSamp InternalData Integer 1251 (23) INT2 NoSampOrig 2561 ConstantValue Integer 2561 (25) INT2 SampType SampType InternalData Integer 1 (27) INT2 CDPFold 58 ConstantValue Integer 58 (29) INT2 SortingType SortingType InternalData Integer 2 (31) INT2 VerticalSum 1 ConstantValue Integer 1 (33) INT2 ConstantValue 0 ConstantValue Integer 0 (35) INT2 ConstantValue 0 ConstantValue Integer 0 (37) INT2 ConstantValue 0 ConstantValue Integer 0 (39) INT2 ConstantValue 0 ConstantValue Integer 0 (41) INT2 ConstantValue 0 ConstantValue Integer 0 (43) INT2 ConstantValue 0 ConstantValue Integer 0 (45) INT2 ConstantValue 0 ConstantValue Integer 0


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(47) INT2 ConstantValue 0 ConstantValue Integer 0 (49) INT2 ConstantValue 0 ConstantValue Integer 0 (51) INT2 ConstantValue 0 ConstantValue Integer 0 (53) INT2 ConstantValue 0 ConstantValue Integer 0 (55) INT2 LengthUnit 1 ConstantValue Integer 1 (57) INT2 ConstantValue 0 ConstantValue Integer 0 (59) INT2 ConstantValue 0 ConstantValue Integer 0 Reel No: 1 Ensemble No: 1 Trace No: 1 SEGY Trace Header Summary Starting Byte Format Name Origin Name Origin Type Origin Format Value (1) INT4 TraceSeqNoLine TraceSeqNoLine InternalData Integer 1 (5) INT4 TraceSeqNoReel TraceSeqNoReel InternalData Integer 1 (9) INT4 ConstantValue 0 ConstantValue Integer 0 (13) INT4 ConstantValue 0 ConstantValue Integer 0 (17) INT4 SourcePointNo 0 ConstantValue Integer 0 (21) INT4 CMPNumber CMP PGSHeader Integer 10001152 (25) INT4 TraceNoCDP SEQNO PGSHeader Integer 1 (29) INT2 TraceType TYPE PGSHeader Integer 1 (31) INT2 NoVertical VSTACK PGSHeader Integer 1 (35) INT2 ConstantValue 0 ConstantValue Integer 0 (37) INT4 Offset OFFSET PGSHeader Integer 121 (41) INT4 ConstantValue 0 ConstantValue Integer 0 (45) INT2 ConstantValue 0 ConstantValue Integer 0 (47) INT2 IntpTrace TYPE PGSHeader Integer 1 (49) INT2 SourceDepth SDEPTH PGSHeader Float 6 (51) INT4 CDPNumber CDP PGSHeader Integer 85687 (55) INT2 ConstantValue 0 ConstantValue Integer 0 (57) INT4 ConstantValue 0 ConstantValue Integer 0 (61) INT4 ConstantValue 0 ConstantValue Integer 0 (65) INT4 ConstantValue 0 ConstantValue Integer 0 (69) INT2 ConstantValue 1 ConstantValue Integer 1 (71) INT2 ConstantValue 1 ConstantValue Integer 1 (73) INT4 CMPX CDP-X PGSHeader Float 449402 (77) INT4 CMPY CDP-Y PGSHeader Float 5507558 (81) INT4 ConstantValue 0 ConstantValue Integer 0 (85) INT4 ConstantValue 0 ConstantValue Integer 0 (89) INT2 ConstantValue 1 ConstantValue Integer 1 (91) INT2 ConstantValue 1500 ConstantValue Integer 1500 (93) INT2 ReplacementVel REPVEL PGSHeader Integer 0 (95) INT2 StreamerDepth RDEPTH PGSHeader Float 8 (97) INT2 ConstantValue 0 ConstantValue Integer 0 (103) INT2 ConstantValue 0 ConstantValue Integer 0 (105) INT2 ConstantValue 5000 ConstantValue Integer 5000 (107) INT2 ConstantValue -120 ConstantValue Integer -120 (109) INT2 TimeFirstSample TIMEFS PGSHeader Integer 0 (115) INT2 NoSampleOnTr NoSamp InternalData Integer 1251 (117) INT2 SampleInt SampInt InternalData Integer 4000 (119) INT2 ConstantValue 0 ConstantValue Integer 0 (121) INT2 ConstantValue 0 ConstantValue Integer 0 (123) INT2 ConstantValue 0 ConstantValue Integer 0 (125) INT4 CMPX CDP-X PGSHeader Float 449402 (129) INT4 CMPY CDP-Y PGSHeader Float 5507558 (133) INT2 ConstantValue 0 ConstantValue Integer 0 (135) INT2 ConstantValue 3 ConstantValue Integer 3 (137) INT2 BULKSH 0 ConstantValue Integer 0 (139) INT2 ConstantValue 0 ConstantValue Integer 0 (141) INT2 ConstantValue 0 ConstantValue Integer 0 (143) INT2 ConstantValue 0 ConstantValue Integer 0 (145) INT2 ConstantValue 0 ConstantValue Integer 0 (147) INT2 ConstantValue 0 ConstantValue Integer 0 (149) INT2 LCFilter LCFILT PGSHeader Integer 4 (151) INT2 HCFilter HCFILT PGSHeader Integer 90 (153) INT2 LCSlopeOrder LCORDER PGSHeader Integer 18 (155) INT2 HCSlopeOrder HCORDER PGSHeader Integer 72 (157) INT2 ConstantValue 0 ConstantValue Integer 0 (159) INT2 ConstantValue 0 ConstantValue Integer 0 (161) INT2 ConstantValue 0 ConstantValue Integer 0 (163) INT2 ConstantValue 0 ConstantValue Integer 0


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(165) INT2 ConstantValue 0 ConstantValue Integer 0 (167) INT2 ConstantValue 0 ConstantValue Integer 0 (169) INT2 TraceWeightFactor TWF PGSHeader Integer 0 (171) INT2 ConstantValue 0 ConstantValue Integer 0 (173) INT2 ConstantValue 0 ConstantValue Integer 0 (175) INT2 ConstantValue 0 ConstantValue Integer 0 (177) INT4 ResidualCMPStat CMPSTA PGSHeader Float 0 (181) INT2 ConstantValue 0 ConstantValue Integer 0 (183) INT2 Vintage VINTAGE PGSHeader Integer 1 (185) INT4 SubLine SUBLINE PGSHeader Integer 1000 (189) INT4 XLine XLINE PGSHeader Integer 1152 (193) INT4 ConstantValue 0 ConstantValue Integer 0 (197) INT4 ConstantValue 0 ConstantValue Integer 0 (201) INT4 ConstantValue 0 ConstantValue Integer 0 (205) INT4 ConstantValue 0 ConstantValue Integer 0 (209) INT4 ConstantValue 0 ConstantValue Integer 0 (213) INT4 CMPWD wbtime PGSHeader Integer 104 (217) INT4 FloatingDatum POSNMO PGSHeader Float 0 (221) INT4 TotalStatics 0 ConstantValue Integer 0 (225) INT4 ConstantValue 0 ConstantValue Integer 0 (229) INT4 ConstantValue 0 ConstantValue Integer 0 (233) INT4 ConstantValue 0 ConstantValue Integer 0 (237) INT4 FloatingDatum 0 ConstantValue Integer 0


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PJ 2D Gathers C 1 CLIENT: BENARIS PETROLEUM N.V SURVEY: BLOCK PJ2D,BASS STRAIT,AUSTRALIA C 2 INLINES: 2002086 C 3 AREA: BENARIS 2D C 4 DATA-SET: 2D RAW MIG GATHERS C 5 ACQ PREFIX: PJ2D PROCESSED DATE: JANUARY-MARCH 2006 C 6 SHOT INTERVAL: 25.0; RCV INTERVAL: 12.5; C 7 CABLE LENGTH: 4350M; RCVS PER CABLE :348; C 8 MIN OFFSET: 108M; MAX OFFSET: 4408M; C 9 SPHEROID OF REF: WGS84; UTM ZONE: 55 SOUTH C10 COORDINATES UNITS: METRES; PROCESSED DATUM: WGS84; C11 SAMPLE RATE (uS): 4000; MAX TIME: 5000MSEC C12 PATTERN: LENGTH WIDTH C13 SWEEP: START HZ END HZ LENGTH MS CHANNEL NO TYPE C14 PROCESSED ONSHORE BY PGS DATA PROCESSING IN PERTH C15 REFORMAT; TRACE EDITS; C16 RECORDING INSTRUMENT DELAY -120ms, GUN/CABLE STATIC CORRECTION; C17 TIDAL STATIC CORRECTION, NAVIGATION MERGE, 1st PASS VELS 1KM GRID; C18 TAU-P DOMAIN DBS AND MUTE; DEPHASE FILTER; C19 SRME (SURFACE RELATED MULTIPLE ELIMINATION) USING 1st PASS VELOCITY; C20 2nd PASS VELOCITY PICKING 1KM GRID; C21 HIGH-RES PARABOLIC RADON DEMULTIPLE; C22 3rd PASS VELOCITY PICKING 1KM GRID; C23 KIRCHHOFF 3D TAPSTM - CURVED RAY, 100% 3rd PASS VELS SMOOTHED 2KM; C24 4th PASS VELS PICKING 1km GRID; DENSE VELS 50m; C25 HIGH-RES PARABOLIC RADON DEMULTIPLE; OUTER/INNER MUTES; C26 C27 SEGY OUTPUT C28 C29 C30 C31 C32 C33 C34 C35 C36 C37 C38 C39 C40 END EBCDIC Tape Binary Header Summary Starting Byte Format Name Origin Name Origin Type Origin Format Value (1) INT4 LineArchiveNum 1 ConstantValue Integer 1 (5) INT4 LineNo 0 ConstantValue Integer 0 (9) INT4 ReelNo ReelNo InternalData Integer 0 (13) INT2 NoTraceRecord NoTraceRecord InternalData Integer 87 (15) INT2 NoAuxTraceRecord 0 ConstantValue Integer 0 (17) INT2 SampInt SampInt InternalData Integer 4000 (19) INT2 SampIntOrig 2000 ConstantValue Integer 2000 (21) INT2 NoSamp NoSamp InternalData Integer 1251 (23) INT2 NoSampOrig 2561 ConstantValue Integer 2561 (25) INT2 SampType SampType InternalData Integer 1 (27) INT2 CDPFold 87 ConstantValue Integer 87 (29) INT2 SortingType SortingType InternalData Integer 2 (31) INT2 VerticalSum 1 ConstantValue Integer 1 (33) INT2 ConstantValue 0 ConstantValue Integer 0 (35) INT2 ConstantValue 0 ConstantValue Integer 0 (37) INT2 ConstantValue 0 ConstantValue Integer 0 (39) INT2 ConstantValue 0 ConstantValue Integer 0 (41) INT2 ConstantValue 0 ConstantValue Integer 0 (43) INT2 ConstantValue 0 ConstantValue Integer 0 (45) INT2 ConstantValue 0 ConstantValue Integer 0 (47) INT2 ConstantValue 0 ConstantValue Integer 0 (49) INT2 ConstantValue 0 ConstantValue Integer 0 (51) INT2 ConstantValue 0 ConstantValue Integer 0 (53) INT2 ConstantValue 0 ConstantValue Integer 0


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(55) INT2 LengthUnit 1 ConstantValue Integer 1 (57) INT2 ConstantValue 0 ConstantValue Integer 0 (59) INT2 ConstantValue 0 ConstantValue Integer 0 Reel No: 1 Ensemble No: 1 Trace No: 1 SEGY Trace Header Summary Starting Byte Format Name Origin Name Origin Type Origin Format Value (1) INT4 TraceSeqNoLine TraceSeqNoLine InternalData Integer 1 (5) INT4 TraceSeqNoReel TraceSeqNoReel InternalData Integer 1 (9) INT4 ConstantValue 0 ConstantValue Integer 0 (13) INT4 ConstantValue 0 ConstantValue Integer 0 (17) INT4 SourcePointNo 0 ConstantValue Integer 0 (21) INT4 CMPNumber CMP PGSHeader Integer 20021827 (47) INT2 IntpTrace TYPE PGSHeader Integer 1 (49) INT2 SourceDepth SDEPTH PGSHeader Float 6 (51) INT4 CDPNumber CDP PGSHeader Integer 3135805 (55) INT2 ConstantValue 0 ConstantValue Integer 0 (57) INT4 ConstantValue 0 ConstantValue Integer 0 (61) INT4 ConstantValue 0 ConstantValue Integer 0 (65) INT4 ConstantValue 0 ConstantValue Integer 0 (69) INT2 ConstantValue 1 ConstantValue Integer 1 (71) INT2 ConstantValue 1 ConstantValue Integer 1 (73) INT4 CMPX CDP-X PGSHeader Float 434774 (77) INT4 CMPY CDP-Y PGSHeader Float 5505646 (81) INT4 ConstantValue 0 ConstantValue Integer 0 (85) INT4 ConstantValue 0 ConstantValue Integer 0 (89) INT2 ConstantValue 1 ConstantValue Integer 1 (91) INT2 ConstantValue 1500 ConstantValue Integer 1500 (93) INT2 ReplacementVel REPVEL PGSHeader Integer 0 (95) INT2 StreamerDepth RDEPTH PGSHeader Float 8 (97) INT2 ConstantValue 0 ConstantValue Integer 0 (103) INT2 ConstantValue 0 ConstantValue Integer 0 (105) INT2 ConstantValue 5000 ConstantValue Integer 5000 (107) INT2 ConstantValue -120 ConstantValue Integer -120 (109) INT2 TimeFirstSample TIMEFS PGSHeader Integer 0 (115) INT2 NoSampleOnTr NoSamp InternalData Integer 1251 (117) INT2 SampleInt SampInt InternalData Integer 4000 (119) INT2 ConstantValue 0 ConstantValue Integer 0 (121) INT2 ConstantValue 0 ConstantValue Integer 0 (123) INT2 ConstantValue 0 ConstantValue Integer 0 (125) INT4 CMPX CDP-X PGSHeader Float 434774 (129) INT4 CMPY CDP-Y PGSHeader Float 5505646 (133) INT2 ConstantValue 0 ConstantValue Integer 0 (135) INT2 ConstantValue 3 ConstantValue Integer 3 (137) INT2 BULKSH 0 ConstantValue Integer 0 (139) INT2 ConstantValue 0 ConstantValue Integer 0 (141) INT2 ConstantValue 0 ConstantValue Integer 0 (143) INT2 ConstantValue 0 ConstantValue Integer 0 (145) INT2 ConstantValue 0 ConstantValue Integer 0 (147) INT2 ConstantValue 0 ConstantValue Integer 0 (149) INT2 LCFilter LCFILT PGSHeader Integer 4 (151) INT2 HCFilter HCFILT PGSHeader Integer 90 (153) INT2 LCSlopeOrder LCORDER PGSHeader Integer 18 (155) INT2 HCSlopeOrder HCORDER PGSHeader Integer 72 (157) INT2 ConstantValue 0 ConstantValue Integer 0 (159) INT2 ConstantValue 0 ConstantValue Integer 0 (161) INT2 ConstantValue 0 ConstantValue Integer 0 (163) INT2 ConstantValue 0 ConstantValue Integer 0 (165) INT2 ConstantValue 0 ConstantValue Integer 0 (167) INT2 ConstantValue 0 ConstantValue Integer 0 (169) INT2 TraceWeightFactor TWF PGSHeader Integer 0 (171) INT2 ConstantValue 0 ConstantValue Integer 0 (173) INT2 ConstantValue 0 ConstantValue Integer 0 (175) INT2 ConstantValue 0 ConstantValue Integer 0 (177) INT4 ResidualCMPStat CMPSTA PGSHeader Float 0 (181) INT2 ConstantValue 0 ConstantValue Integer 0 (183) INT2 Vintage VINTAGE PGSHeader Integer 1 (185) INT4 SubLine SUBLINE PGSHeader Integer 2002086 (189) INT4 XLine XLINE PGSHeader Integer 1827


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(193) INT4 ConstantValue 0 ConstantValue Integer 0 (197) INT4 ConstantValue 0 ConstantValue Integer 0 (201) INT4 ConstantValue 0 ConstantValue Integer 0 (205) INT4 ConstantValue 0 ConstantValue Integer 0 (209) INT4 ConstantValue 0 ConstantValue Integer 0 (213) INT4 CMPWD wbtime PGSHeader Integer 103 (217) INT4 FloatingDatum POSNMO PGSHeader Float 0 (221) INT4 TotalStatics 0 ConstantValue Integer 0 (225) INT4 ConstantValue 0 ConstantValue Integer 0 (229) INT4 ConstantValue 0 ConstantValue Integer 0 (233) INT4 ConstantValue 0 ConstantValue Integer 0 (237) INT4 FloatingDatum 0 ConstantValue Integer 0


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PJ 3D Final Migrated Stack(full offset) C 1 CLIENT :BENARIS PETROLEUM N.V SURVEY BLOCK PJ3D, BASS STRAIT, AUSTRALIA C 2 INLINES 1000-1520; XLINES :576-1199 C 3 AREA :T/39 P C 4 DATA-SET :FINAL MIG (OFFSETS 196-4396/75) C 5 C 6 TAPE NO: PJ3DS37 C 7 ACQ PREFIX :PJ05 PROCESSED DATE :JANUARY-MARCH 2006 C 8 SHOT/RCV INTERVAL :18.75/12.5 NO.GUNS/CABLES :02/04 C 9 CABLE LENGTH :4350M RCVS PER CABLE :348 C10 GUN SEPARATION :50M CABLE SEPARATION :100M C11 PORT SOURCE NO:ARRAY-2 STARBOARD SOURCE NO.:ARRAY-1 C12 FAR PORT CABLE NO.:STREAMER-4 FAR STARBOARD CABLE NO. :STREAMER-1 C13 MIN OFFSET :94M MAX OFFSET :4435M C14 SPHEROID OF REF :WGS84 UTM ZONE :55 C15 COORDINATES UNITS :METRES PROCESSED DATUM :WGS84 C16 BINNING ORIGIN (E,N) 453461.53; 5503158.50 C17 BINNING ORIGIN (XLINE,INLINE) 340,961 C18 NO. XLINES/INLINES:1093/600 XLINE/INLINE INT :25.0/25.0 C19 GRID MIN/MAX XLINE:340/1432 GRID MIN/MAX INLINE:961/1560 C20 ROTATION ANGLE :308 (DEGR) (CLOCKWISE=POSITIVE) C21 SAMPLE RATE (uS) :4000 MAX TIME (MS) :5000 C22 ======PROCESSED ONSHORE BY PGS DATA PROCESSING IN PERTH========= C23 REFORMAT; TRACE EDITS, C24 RECORDING INSTRUMENT DELAY -120ms, GUN/CABLE STATIC CORRECTION, C25 TIDAL STATIC CORRECTION; NAVIGATION MERGE; 1st PASS VELS 1KM GRID; C26 TAU-P DOMAIN DBS AND MUTE; DEPHASE FILTER; C27 SRME (SURFACE RELATED MULTIPLE ELIMINATION) USING 1st PASS VELOCITY; C28 2nd PASS VELS 1KM GRID; HIGH-RES PARABOLIC RADON DEMULTIPLE; C29 CHANNEL SUMMATION(12.5 to 25m); SORT TO OFFSET PLANES; C30 XLINE INTERPOLATION OF MISSING OFFSET-TRACES; C31 3rd PASS PSTM-VELS 1KM GRID; C32 KIRCHHOFF 3D TAPSTM - CURVED RAY, 100% 3rd PASS VELS SMOOTHED 2KM; C33 SORT TO CDP; 4th PASS PSTM-VELS 0.5KM GRID; DENSE VELS 50m; C34 HIGH-RES PARABOLIC RADON DEMULTIPLE; OUTER/INNER MUTES; C35 STACK: DAS 21tr AVG IN XLINE DIRN; ZERO PHASING FILTER+POLARITY REVERSAL; C36 Q COMPENSATION(phase only); TVF; RESIDUAL GAIN; TRACE SUMMATION(INL

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3d and 2d Seismic Surveys Block T-39p, Bass Strait Australia